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8590A upgrade/conversion?

Question asked by madhu on Feb 10, 2015
Latest reply on Jun 4, 2015 by rmaich
Is it possible to upgrade an 8590A to improve its frequency stability?
Has anyone done anything like that?

From what I understand, the first LO is open loop, so it will drift.
My guess is that it shares many components from higher end spectrum analyzers, so maybe the first LO and related guts can be swapped out? Of course, there are front panel control issues, so it will likely require quite a bit more.

Alternatively, would it be possible to augment the first LO with external frequency control to stabilize it? Again, there will be challenges with front panel control. If it was possible to decode the center frequency and span input, I can picture a number of techniques that could be used to lock it to a stable reference.

I know it sounds crazy, but maybe, just maybe...